ACHI vs UEFI which one?

Webslinger64

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Sep 25, 2013
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Just installed a new HDD and want to load Windows 7 Professional 64-bit OS. I know I need to change the boot order so the PC boots from the DRW drive with the OS installation disc in it. When I enter BIOS, then boot options, I see the following selections for the DRW drive:

UEFI: ASUS DRW-24F1ST a

ACHI: ASUS DRW-24F1ST

I am unsure which one to select for the boot process.

Thanks!

 

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